<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>留言板</title>
    <style>
        .container {
            width: 350px;
            height: 300px;
            margin: 0 auto;
            /* border: 1px black solid; */
            text-align: center;
        }

        .grey {
            color: grey;
        }

        .container .row {
            width: 350px;
            height: 40px;

            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .container .row input {
            width: 260px;
            height: 30px;
        }

        #submit {
            width: 350px;
            height: 40px;
            background-color: orange;
            color: white;
            border: none;
            margin: 10px;
            border-radius: 5px;
            font-size: 20px;
        }
    </style>
</head>

<body>
<div class="container">
    <h1>留言板</h1>
    <p class="grey">输入后点击提交, 会将信息显示下方空白处</p>
    <div class="row">
        <span>谁:</span> <input type="text" name="" id="from">
    </div>
    <div class="row">
        <span>对谁:</span> <input type="text" name="" id="to">
    </div>
    <div class="row">
        <span>说什么:</span> <input type="text" name="" id="say">
    </div>
    <input type="button" value="提交" id="submit" >
    <!-- <div>A 对 B 说: hello</div> -->
</div>

<script src="./js/jquery-3.7.1.js"></script>
<script>
    $.ajax({
        url: "/getMessage",
        type: "post",
        success: function (e){
            //增强for循环
            for(var message of e){
                var from = message.from;
                var to = message.to;
                var say = message.say;
                //2. 构造节点
                var divE = "<div>"+from +"对" + to + "说:" + say+"</div>";
                //3. 把节点添加到页面上
                $(".container").append(divE);
                console.log("添加完数据");
            }
        }
    });

   $('#submit').click( function submit(){
    console.log("开始提交数据");
    //1. 获取留言的内容
    var from = $('#from').val();
    var to = $('#to').val();
    var say = $('#say').val();
    if (from == '' || to == '' || say == '') {
        return;
    }
    $.ajax({
        url: "/addMessage",
        type: "post",
        data:{
            "from": from,
            "to": to,
            "say": say
        },
        success: function (message){
            // 打印
             from = message.from;
             to = message.to;
             say = message.say;
            //2. 构造节点
            var divE = "<div>"+from +"对" + to + "说:" + say+"</div>";
            //3. 把节点添加到页面上
            $(".container").append(divE);
            console.log("添加完数据");
            //4. 清空输入框的值
            $('#from').val("");
            $('#to').val("");
            $('#say').val("");
        }
    });
})


</script>
</body>

</html>